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Preparation method and application of layered Steiner network structure fiber membrane

A technology of network structure and fiber membrane, which is applied in the field of explosive detection and analysis, to achieve the effects of strong moisture retention, high sensitivity, and good acid and alkali resistance

Active Publication Date: 2020-06-02
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, however, so far, no one has proposed the use of electrospinning technology to create a paper-based material suitable for colorimetric detection, making it universally applicable to improve the sensitivity of colorimetric detection.

Method used

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  • Preparation method and application of layered Steiner network structure fiber membrane
  • Preparation method and application of layered Steiner network structure fiber membrane
  • Preparation method and application of layered Steiner network structure fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Dissolve 0.2g polymer polyvinyl alcohol in 20g deionized water, heat and stir at 100°C for 1 hour, then cool to room temperature, then add porogen dichloromethane and crosslinking agent glutaraldehyde, and continue stirring for 1 hour Hour, make spinning solution; Wherein, porogen methylene chloride accounts for 1% of the mass fraction of spinning solution, and cross-linking agent glutaraldehyde accounts for 1% of the mass fraction of spinning solution;

[0026] b. Add the spinning solution obtained in step a into the electrospinning syringe, select a 1.64mm needle, the distance between the needle of the syringe and the electrospinning collector is 8cm, the voltage is 11kV, and the flow rate is 0.6ml / h for electrospinning , the spinning time is 60min, and the spinning fiber film is collected with aluminum foil;

[0027] c. After the electrospinning is finished, put the aluminum foil paper and the fiber membrane in a desiccator filled with catalyst hydrochloric acid, ...

Embodiment 2

[0032] a. Dissolve 0.8g polymer chitosan in 20g deionized water, heat and stir at 100°C for 3 hours, then cool to room temperature, then add porogen polyvinyl alcohol and crosslinking agent methylenebisacrylamide, and continue Stir for 1 hour to make a spinning solution; wherein, the porogen polyvinyl alcohol accounts for 50% of the mass fraction of the spinning solution, and the crosslinking agent methylene bisacrylamide accounts for 5% of the spinning solution;

[0033] b. Add the spinning solution obtained in step a into the electrospinning syringe, select a 1.64mm needle, the distance between the needle of the syringe and the electrospinning collector is 5cm, the voltage is 25kV, and the flow rate is 1ml / h for electrospinning. The spinning time is 100min, and the spinning fiber film is collected with aluminum foil;

[0034] c. After the electrospinning is finished, put the aluminum foil paper and the fiber membrane in a drier filled with catalytic sulfuric acid, and cataly...

Embodiment 3

[0039] a. Dissolve 0.5g polymer polyvinylpyrrolidone in 20g deionized water, heat and stir at 100°C for 2 hours, then cool to room temperature, then add porogen dimethyl sulfoxide and crosslinking agent triethanolamine, and continue stirring In 1 hour, a spinning solution was prepared; wherein, the porogen dimethyl sulfoxide accounted for 20% of the mass fraction of the spinning solution, and the crosslinking agent triethanolamine accounted for 2% of the mass fraction of the spinning solution;

[0040] b. Add the spinning solution obtained in step a into the electrospinning syringe, select a 1.64mm needle, the distance between the needle of the syringe and the electrospinning collector is 18cm, the voltage is 8kV, and the flow rate is 0.8ml / h for electrospinning , the spinning time is 180min, and the spinning fiber film is collected with aluminum foil;

[0041] c. After the electrospinning is finished, put the aluminum foil paper and the fiber membrane in a drier filled with c...

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Abstract

The invention discloses a preparation method and an application of a layered Steiner network structure fiber membrane. The layered Steiner network structure fiber membrane is prepared from the following polymers: polyvinyl alcohol, chitosan, polyvinylpyrrolidone, polyacrylic acid, polypropylene cellulose, polycarbonate and polyimide, the following pore-foaming agent: dichloromethane, polyvinyl alcohol, dimethyl sulfoxide, ammonium bicarbonate, sodium bicarbonate, acetone or tetrahydrofuran, the following cross-linking agents: glutaraldehyde, methylene bisacrylamide, triethanolamine, polyethyleneimine or diethylenetriamine, the following catalysts: hydrochloric acid, sulfuric acid or phosphoric acid and a solvent being deionized water. When the layered Steiner network structure fiber membrane prepared by adopting the preparation method is applied to colorimetric explosive detection, the sensitivity of colorimetric detection can be improved in two aspects of reaction time and response degree, and the layered Steiner network structure fiber membrane has the advantages of being sensitive in reaction, instant in result display, simple in operation and use method and the like. Moreover,various non-standard explosives and standard explosive raw materials are detected and identified according to different explosive detection reagents loaded in the fiber membrane, so that the layered Steiner network structure fiber membrane has universality.

Description

technical field [0001] The invention belongs to the field of detection and analysis of explosives, and in particular relates to a preparation method of a layered Steiner network structure fiber membrane and its application in detection of explosives. Background technique [0002] The colorimetric detection method has strong specificity, can be realized without external equipment, and is low in cost. It is very suitable for rapid on-site detection and analysis of explosives (ACS Applied Materials & Interfaces, 2017, 9(28): p.23884-23893). Paper-based colorimetric detection is very suitable for on-site detection and analysis because of its obvious color contrast, simple sampling, low cost, disposable use and easy combination with portable equipment. This makes paper-based colorimetric detection widely used in many trace analysis fields. At present, the problems of paper-based colorimetric detection are mainly due to the lack of signal enhancement, which limits the sensitivity...

Claims

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Application Information

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IPC IPC(8): G01N21/78D04H1/728
CPCG01N21/78D04H1/728Y02E60/10
Inventor 窦新存王培贤蔡珍珍祖佰祎
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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